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ShipData.cpp
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ShipData.cpp
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/*
This file is part of Ship Multi-Instrument
Copyright(C) 2014 Carsten Agerskov
This program is free software : you can redistribute it and / or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program.If not, see <http://www.gnu.org/licenses/>.
*/
#include "ShipData.h"
ShipData::ShipData() {
lastTWS = 0;
for (int i = 0; i < MAX_VALUES; i++) {
value[i].reserve(MAX_VALUE_LENGTH);
value[i] = "";
validTime[i] = DEFAULT_VALID_TIME;
timeStamp[i] = 0;
approxMaxTimeFilter10m = new ApproxMaxTimeFilter(10,60000);
approxMaxTimeFilter60m = new ApproxMaxTimeFilter(6,600000);
}
};
void ShipData::print() {
for (int i = 0; i < MAX_VALUES; i++) {
Serial.print("i = ");
Serial.print(i);
Serial.print(": value = ");
Serial.print(value[i]);
Serial.print(": timeStamp = ");
Serial.println(timeStamp[i]);
}
}
String ShipData::getValue(int indexToFind) {
return value[indexToFind];
};
void ShipData::setValue(int indexToSet, String valueToSet, unsigned long timeStampToSet) {
value[indexToSet] = valueToSet;
timeStamp[indexToSet] = timeStampToSet;
Serial.println(value[indexToSet]);
}
float ShipData::stringToFloat(String s) {
char carray[s.length() + 1];
s.toCharArray(carray, sizeof(carray));
return atof(carray);
}
String ShipData::floatToString1d(float f) {
char tmp[10];
dtostrf(f, 8, 1, tmp);
String s = tmp;
s.trim();
return s;
}
String ShipData::floatToString0d(float f) {
char tmp[10];
dtostrf(f, 9, 0, tmp);
String s = tmp;
s.trim();
return s;
}
String ShipData::ktsToMs(String kts) {
float fKts = stringToFloat(kts);
return floatToString1d(fKts*0.514);
}
float ShipData::ktsToMs(float kts) {
return kts*0.514;
}
void ShipData::calculate() {
float sog = stringToFloat(value[SOG]);
float rws = stringToFloat(value[RWS]);
float rwa = stringToFloat(value[RWA]) * 0.0174532925; /* Convert to rad */
/* source http://en.wikipedia.org/wiki/Apparent_wind */
float tws = sqrt(rws*rws + sog*sog - 2 * rws*sog*cos(rwa));
float twa = 0;
if (tws > 0.2) {
twa = acos((rws*cos(rwa) - sog) / tws) * 57.2957795; /* Convert to deg */
}
else {
tws = 0;
}
tws = ktsToMs(tws);
value[TWS] = floatToString1d(tws);
timeStamp[TWS] = millis();
value[TWA] = floatToString1d(twa);
timeStamp[TWA] = millis();
if ( tws > lastTWS ) {
float tmp = tws;
tws = lastTWS;
lastTWS = tmp;
}
else {
lastTWS = tws;
}
approxMaxTimeFilter10m->putValue(tws);
value[MWS10] = floatToString1d(approxMaxTimeFilter10m->getMax());
timeStamp[MWS10] = millis();
approxMaxTimeFilter60m->putValue(tws);
value[MWS60] = floatToString1d(approxMaxTimeFilter60m->getMax());
timeStamp[MWS60] = millis();
float hh = stringToFloat(value[UTC].substring(0, 2));
hh = hh + 2;
if (hh > 24) hh = hh - 24;
if (hh < 0) hh = hh + 24;
value[LTZ] = floatToString0d(hh) + value[UTC].substring(2, 5);
float tcp45 = stringToFloat(value[TC]) + 45;
if (tcp45 > 359) tcp45 = tcp45 - 360;
value[TCP45] = floatToString0d(tcp45);
float tcm45 = stringToFloat(value[TC]) - 45;
if (tcm45 < 0) tcm45 = tcm45 + 360;
value[TCM45] = floatToString0d(tcm45);
value[VMGW] = floatToString1d(sog * cos(twa * 0.0174532925));
}